{"instruction": "You are an expert in event extraction. Please extract events from the input that conform to the schema definition. Return an empty list for events that do not exist, and return NAN for arguments that do not exist. If an argument has multiple values, please return a list. Respond in the format of a JSON string.", "schema": [{"event_type": "adverse event", "trigger": true, "arguments": ["Treatment.Time_elapsed", "Combination.Drug", "Subject.Population", "Effect", "Treatment.Route", "Treatment.Freq", "Treatment.Dosage", "Subject.Age", "Subject", "Subject.Gender", "Treatment.Drug"]}, {"event_type": "potential therapeutic event", "trigger": true, "arguments": ["Subject.Race", "Subject.Population", "Treatment.Dosage", "Combination.Drug", "Treatment", "Treatment.Time_elapsed", "Subject.Gender", "Treatment.Drug", "Subject", "Subject.Disorder", "Treatment.Duration", "Subject.Age", "Treatment.Disorder", "Treatment.Freq", "Effect", "Treatment.Route"]}], "input": "Bone marrow chromosomes were studied in 2 patients with polycythaemia vera (PV) at the time of diagnosis and several times subsequently during therapy with chlorambucil."}
{"adverse event": [], "potential therapeutic event": [{"trigger": "therapy ", "arguments": {"Subject.Race": "NAN", "Subject.Population": "2", "Treatment.Dosage": "NAN", "Combination.Drug": "NAN", "Treatment": "chlorambucil", "Treatment.Time_elapsed": "NAN", "Subject.Gender": "NAN", "Treatment.Drug": "chlorambucil", "Subject": "2 patients with polycythaemia vera (PV)", "Subject.Disorder": "NAN", "Treatment.Duration": "NAN", "Subject.Age": "NAN", "Treatment.Disorder": "polycythaemia vera (PV)", "Treatment.Freq": "NAN", "Effect": "NAN", "Treatment.Route": "NAN"}}]}